Search for dissertations about: "atomic-force"

Showing result 1 - 5 of 288 swedish dissertations containing the word atomic-force.

  2. 1. Surface interactions and adsorbate structures : An atomic force microscopy study

    Author : Goran Bogdanovic; KTH; []
    Keywords : atomic force microscope; AFM; cantilever calibration; colloidal probe; surface force; force curve; friciton; hydrophobic; adhesion; roughness; multilayer; silica; cellulose; cationic polyelectrolyte; MAPTAC;

    Abstract : Atomic force microscopy, AFM, was used for studying somecurrent topics in the field of surface and colloid science. Themain topics addressed in this thesis were: the nature of thelong-range attraction between hydrophobic surfaces; slidingfriction behavior for microscopic contacts; and interfacialstructuring of polyelectrolyte-nanoparticle multilayerfilms. READ MORE

  4. 2. Investigating nano-scale viscous and elastic forces withintermodulation : Studies in multifrequency atomic force microscopy

    Author : Per-Anders Thorén; David B. Haviland; Greg Haugstad; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic Force Microscopy; Nonlinear dynamics; Soft materials; High- speed friction measurements; Modeling and numerical simulations; Fysik; Physics;

    Abstract : Investigating visco-elastic forces at the nanometer-scale is important to thecharacterization of soft materials. A quantitative force measurement can be ob-tained using an atomic force microscope (AFM) with a calibrated force transducer(the AFM cantilever). READ MORE

  5. 3. Imaging materials with intermodulation : Studies in multifrequency atomic force microscopy

    Author : Daniel Forchheimer; David Haviland; Arvind Raman; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; atomic force microscopy; nonlinear dynamics; frequency mixing; force reconstruction; Fysik; Physics;

    Abstract : The Atomic Force Microscope (AFM) is a tool for imaging surfaces at the microand nano meter scale. The microscope senses the force acting between a surfaceand a tip positioned at the end of a micro-cantilever, forming an image of the surface topography. READ MORE

  6. 4. Nanostructures Studied by Atomic Force Microscopy : Ion Tracks and Nanotextured Films

    Author : Judit Kopniczky; Claes-Göran Granqvist; Lars Montelius; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; ion impact; surface tracks; electronic sputtering; WO3; nanoparticle; scanning probe microscopy; tapping mode; Fysik; Physics; Fysik;

    Abstract : The work presented in this thesis concernes two sorts of nanostructures: energetic-ion-impact-induced surface tracks and gas-deposited WO3 nanoparticles. Our aims to characterise these nanostuctures and understand the physical principles behind their formation are of general interests for basic science as well as of the field of nanotechnology. READ MORE

  7. 5. Adsorption at the Solid-Liquid Interface: An Atomic Force Microscopy Study

    Author : Lachlan M Grant; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; hydrophobicity.; self-assembly; aggregate geometry; atomic force microscopy; nonionic; adsorption; surfactant; Fysikalisk kemi; Chemistry; Kemi;

    Abstract : The aim of the work presented in this thesis was to investigate nature of adsorption of amphiphiles to the solid–liquid interface. The surface aggregate structures of the zwitterionic surfactant dodecyldimethylammoniopropanesulfonate, (DDAPS) and a series of nonionic polyoxyethlylene glycol alkyl ethers (C10E5, C12E5, C12E8, C10E6, C14E6 and C16E6) have been determined by Atomic Force Microscopy on solids of different hydrophobicity. READ MORE